vette_c6

hey guys
after i break my old engine and broke my supercharger ( F1C )
i went to a Stroker 403 CID
but i think ihave a problem !
my heads are AFR 72 225
my Crank is Callias 4
my Connecting road 6.125
my piston is Wisco +5 4.005
my engine compression is 11.7 with the cometic gasket .051
i asked Patrick G to Custom camshaft for me to shot 200 Wet Nitrous
and i also asked him to give me the camshat with Lop 114
so he gave me Duration 243 247
with lifts 630 630
i took the car to the dyno
and i had 465 RWHP on dyno jet
the car is Corvette 2006 Z51
with Kooks 1/7/8 headers + Zo6 Full exhust
is there is something wrong with the car ?
or the nitrous Cam do that ?
my old engine i tested
with exactly the same package but Difrenet piston which was -15
so i had engine compression 9.7 for the Supercharger
i runned the engine with SC4 camshaft from LS1speed
without a Real tune with 11.5 AFR ( without supercharger ,, just a run to see )
i had 440 !!!!!!!
so moving from 9.7 engine compreesion to 11.7 ,,, are only around 2 RWHP ?
or something is wrong ?

LS1MCSS

iTrader: (18)

You have 465 RWHP on the new engine and 440 on the old. That's not 2hp it's 25 and I would say, no, you don't have anything wrong.

GTO 3447

it could be that the cam is designed to come alive only on the 200 shot. Otherwise I say something is wrong. An Ls 403 with AFR heads should be easily over 500hp.

vette_c6

This is what i thought !'

MrElectric03

iTrader: (71)

Different motors, different dynos, different combos.

Are you sure on that compression though? I mean im not sure it just sounds funny because my motor has 58cc chambers, -3cc valve reliefs, with .040 gaskets and im at 11.5:1. I guess its just the added stroke.

The numbers do seem a little low for a 403 with a manual trans. Ive seen 402s with smaller cams and budget heads make 500rwhp in F bodies but a vette will make less due to IRS.

SOMbitch

iTrader: (8)

a little low maybe.... #'s in sig w/ a smaller cam and a4 and less than ideal exhaust.....

briancb1

I've seen different dyno vary by 100RWHP! no joke.

Use it as a tuning tool nothing more. If your ripping out 11 second 1/4 mile times who cares what the numbers say.

FloydSummerOf68

iTrader: (1)

I'd hope he's ripping out a lot more than that with a 403 stroker. On the 200 shot I'd be looking for LOW 10s